\begin{tikzpicture}
    \tkzDefPoints{0/0/B, 3/0/C, -1/2.5/A, 2/2.5/D}

    \tkzDrawPolygon(A,B,C,D)
    \tkzDrawSegments(A,C  B,D)
    \tkzMarkAngles[size=0.5](C,A,D  D,B,A  A,C,B  B,D,C)
    \tkzMarkAngles[size=0.4](B,A,C  C,B,D  D,C,A  A,D,B)
    \tkzLabelAngle[pos=0.7](C,A,D){$1$}
    \tkzLabelAngle[pos=0.7](D,B,A){$3$}
    \tkzLabelAngle[pos=0.7](A,C,B){$5$}
    \tkzLabelAngle[pos=0.7](B,D,C){$7$}
    \tkzLabelAngle[pos=0.6](B,A,C){$2$}
    \tkzLabelAngle[pos=0.6](C,B,D){$4$}
    \tkzLabelAngle[pos=0.6](D,C,A){$6$}
    \tkzLabelAngle[pos=0.6](A,D,B){$8$}
    \tkzLabelPoints[above](A,D)
    \tkzLabelPoints[below](B,C)
\end{tikzpicture}

